couplet #8
8. Ventral 0.5 of mesopleuron with coarse longitudinal rugulae and regular punctation. Basal 0.5 of T2 granulate, remaining portion of T2 and T3-7 smooth. Tarsal claws elongate, weakly curved. Antenna with 20 flagellomeres. Distribution: northern North America (Northwest Territories).
8’. Ventral 0.5 of mesopleuron either 1) smooth, regular to scattered punctures, and without rugulae, or 2) granulate and usually with close, fine longitudinal rugulae. T2 with at least basal 0.7 granulate, usually completely; T3-4 almost always with some basal granulate sculpture. Tarsal claws stouter, abruptly curved apically. Antenna with 22-31 flagellomeres.
future couplets
9. Ventral 0.5 of mesopleuron smoot...
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Cylloceria melancholica
9’. Ventral 0.5 of mesopleuron gran...
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Cylloceria striatula
